Test:
Percentages II - Ambitious
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Question 1:
Write as a percentage
1
2
5
A
50
%
B
30
%
C
140
%
D
14
%
Question 2:
Find a number if
4
%
of that number is
15
A
37.5
B
60
C
6
D
375
Question 3:
In a park grows
300
oaks. How many trees are in the park, if the oaks make up
25
%
of all trees?
A
600
B
650
C
120
D
1200
Question 4:
Find
8
%
of
4
k
m
A
400
m
B
32
m
C
320
m
D
3
k
m
Question 5:
Cost of manufacturing parts at the factory is
680
pounds. The introduction of new technologies has allowed to reduce the cost by
2
%
. What is the cost of manufacturing parts after changes?
A
£
666.4
B
£
672
C
£
670
D
£
666
Question 6:
When grinding wheat, the yield of flour is
80
%
. How much wheat should be used to get
610
k
g
kg of flour?
A
762
k
g
B
690
k
g
C
700
k
g
D
762.5
k
g
Question 7:
The width of the rectangle is
6
c
m
and is
32
%
of its length. Find the perimeter of the rectangle.
A
48
c
m
B
47
c
m
C
49
c
m
D
49.5
c
m
Question 8:
The alloy of gold and silver contains
40
%
of gold. What is the mass of the alloy, if the gold weighs
335
g
?
A
837.5
g
B
800
g
C
820
g
D
810
g
Question 9:
The height of the rectangular parallelepiped is
5
c
m
. It is
40
%
of the length and
60
%
of the width. Find the volume of the parallelepiped.
A
625
m
3
B
625
c
m
3
C
620
c
m
3
D
623
c
m
3
Question 10:
Find
35
%
of the sum of
1
13
14
and
3
4
A
0.04
B
1
4
C
0.4
D
4
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